Sheeting.



, PATBNTED'DEG. 1, 1903. D. D. MoBEAN.

, SHBETING. APPLIGATION FILED MAY 9, 1908.

2 SHEETS-SHEET 1.

N0 MODEL.

UNITED STATES Fatented December 1, 1902;.

DUNCAN D. MCBEAN, OF NEW YORK, N. Y.

SHEETING.

SPECIFICATION forming part of Letters Patent No. 745,452, dated December 1, 1903.

Application filed May 9, 1903. Serial No. 156,406. (No model.)

To all whom, it may concern.-

Be it known that I, DUNCAN D. MCBEAN, of the city, county, and State of New York, have invented a new and useful Improvement in Sheeting, of which the following is a specification.

My invention consists in an improved form of sheeting for use in sewer, tunnel, and other excavating work for the purposeof support ing the adjacent wall or bankof earth; and it consists in the features of construction hereinafter described and claimed.

In excavaiing work of great depth it becomes necessary to employ sheeting for supporting the ca rth side walls of greater lengths than can be readily obtained in the form of single-piece timber. It is also essential to have the sheeting of such width that it can be controlled in driving and not twist or turn out of alineinent, as is apt to be the case with single-piece timber of ordinary width. To meet the requirements of such work, I provide a composite or built-up sheeting made of aseries of short pieces bolted together and finished as hereinafter described.

In the accompanying drawings, forming part of this specification, Figures 1 and 2 are perspective views of a piece of sheeting, Fig. 1 showing the grooved edge and Fig. 2 the tenon edge of the same. Fig. .3 is an elevation, and Fig. 4 is an enlarged cross-section, of the same. Fig. 5 shows a series of sheetings driven into the earth, forming a wall; and Fig. 6 is a cross-section of the same, showing the interlocking tongue-and-groove connection between the several sheetings;

As shown in the drawings, the sheeting A is built up of series of prefcrablysquare sawed Fig. 4, the dimensions of the timber which I have commonly used in heavy work being twelve inches by twelve inchesJhus consti- 4 and upon the outer margins of the opposite edge of the sheeting similar strips 5 5, leaving a groove 6 bet-ween of the same dimensions as the tenon 4, whereby in the assembling of the sheeting in construction work the tenon of one sheeting-piece will work in the groove of the one adjacent. The lower end of the sheet-. ing is preferably chamfered or sharpened on both sides, as at 7, to enable it to penetrate the soil more readily. In order to hold the sheeting while being driven in close contact out of the groove any material which has lodged therein, leaving a free path and seat for the tongue. The shootings when thus driven serially into the soil present the appearance shown in Fig. 5.

It is evident that by meansof my invention a sheeting of almost any desired dimensions may be secured, the length being proportioned to the depth to which the excavation is intended to be carried and the thickness to the load which it must support when in position.

I claim- 1. A composite sheeting having tongueand-grooved edges, a chamfered or beveled point with'the tongue projecting beyond the end of the sheeting, and means for laterally deflecting the sheeting when driven intothe soil, for the purpose specified.

2. As a new article of manufacture, a composite sheeting comprising a plurality of similar rectangular timbers of varying lengths, secured edge to edge, the edges of the sheeting being provided respectively with a tongue and a groove, and the entering end-or point of the sheeting being tapered across its'width, and provided with inclined shoulders at one edge, substantially as set forth.

3. A composite or built-up sheeting having its edges tongued and grooved, a tapering not less than three members, secured together side by side bya series of lateral bolts, the splices orjoints being formed by the staggering or breaking of the joints of the several members, and having a chamfered 0r beveled point and inclined shoulders, substantially as set forth.

Signed at New York city this 4th day of May, 1903.

DUNCAN D. MCBEAN.

Witnesses:

ANNA W. MCBEAN, J. T. CRANE. 

